2 * Copyright (C) 2007 Red Hat, Inc. All rights reserved.
4 * This copyrighted material is made available to anyone wishing to use,
5 * modify, copy, or redistribute it subject to the terms and conditions
6 * of the GNU General Public License v.2.
9 #include <net/genetlink.h>
10 #include <linux/dlm.h>
11 #include <linux/dlm_netlink.h>
13 #include "dlm_internal.h"
15 static uint32_t dlm_nl_seqnum;
16 static uint32_t listener_nlpid;
18 static struct genl_family family = {
19 .id = GENL_ID_GENERATE,
20 .name = DLM_GENL_NAME,
21 .version = DLM_GENL_VERSION,
24 static int prepare_data(u8 cmd, struct sk_buff **skbp, size_t size)
29 skb = genlmsg_new(size, GFP_KERNEL);
33 /* add the message headers */
34 data = genlmsg_put(skb, 0, dlm_nl_seqnum++, &family, 0, cmd);
44 static struct dlm_lock_data *mk_data(struct sk_buff *skb)
48 ret = nla_reserve(skb, DLM_TYPE_LOCK, sizeof(struct dlm_lock_data));
54 static int send_data(struct sk_buff *skb)
56 struct genlmsghdr *genlhdr = nlmsg_data((struct nlmsghdr *)skb->data);
57 void *data = genlmsg_data(genlhdr);
60 rv = genlmsg_end(skb, data);
66 return genlmsg_unicast(skb, listener_nlpid);
69 static int user_cmd(struct sk_buff *skb, struct genl_info *info)
71 listener_nlpid = info->snd_pid;
72 printk("user_cmd nlpid %u\n", listener_nlpid);
76 static struct genl_ops dlm_nl_ops = {
81 int __init dlm_netlink_init(void)
85 rv = genl_register_family(&family);
89 rv = genl_register_ops(&family, &dlm_nl_ops);
94 genl_unregister_family(&family);
98 void dlm_netlink_exit(void)
100 genl_unregister_ops(&family, &dlm_nl_ops);
101 genl_unregister_family(&family);
104 static void fill_data(struct dlm_lock_data *data, struct dlm_lkb *lkb)
106 struct dlm_rsb *r = lkb->lkb_resource;
108 memset(data, 0, sizeof(struct dlm_lock_data));
110 data->version = DLM_LOCK_DATA_VERSION;
111 data->nodeid = lkb->lkb_nodeid;
112 data->ownpid = lkb->lkb_ownpid;
113 data->id = lkb->lkb_id;
114 data->remid = lkb->lkb_remid;
115 data->status = lkb->lkb_status;
116 data->grmode = lkb->lkb_grmode;
117 data->rqmode = lkb->lkb_rqmode;
119 data->xid = lkb->lkb_ua->xid;
121 data->lockspace_id = r->res_ls->ls_global_id;
122 data->resource_namelen = r->res_length;
123 memcpy(data->resource_name, r->res_name, r->res_length);
127 void dlm_timeout_warn(struct dlm_lkb *lkb)
129 struct sk_buff *uninitialized_var(send_skb);
130 struct dlm_lock_data *data;
134 size = nla_total_size(sizeof(struct dlm_lock_data)) +
135 nla_total_size(0); /* why this? */
137 rv = prepare_data(DLM_CMD_TIMEOUT, &send_skb, size);
141 data = mk_data(send_skb);
143 nlmsg_free(send_skb);
147 fill_data(data, lkb);